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Saha D, Dey T, Pal I, Kundu A, Majumdar S, Sadhu S, Yatirajula SK, Rath J, Ray SK, Dey B. Solvent-Directed Bioactive Supramolecular Zinc(II)-Metallogels: Exploring Semiconducting Aptitudes of Fabricating p-n Junction and Schottky Devices. ACS APPLIED BIO MATERIALS 2024; 7:5609-5621. [PMID: 39074362 DOI: 10.1021/acsabm.4c00694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
α-Ketoglutaric acid-based supramolecular Zn(II) metallogels in N,N'-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) solvent (i.e., Zn-α-Glu-DMF and Zn-α-Glu-DMSO) were successfully achieved. Zinc(II) acetate salt and α-ketoglutaric acid directed a three-dimensional noncovalent supramolecular network individually entrapped with N,N'-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) solvent to accomplish their respective semisolid flexible metallogel frameworks. The gel features of these synthesized materials were verified by rheological experiments such as amplitude sweep and frequency sweep measurements. The discrete morphological arrangements were analyzed for these metallogel samples through field emission scanning electron microscopic (FESEM) analysis. Highly stacked interconnected blocks of Zn-α-Glu-DMF with hierarchical arrays are found due to the occurrence of diverse noncovalent supramolecular interactions present in the metallogel framework. A distinct spherical shaped microstructure with interconnected hierarchical assembly has been observed for the FESEM pattern of Zn-α-Glu-DMSO. FTIR spectroscopic measurement was carried out to detect some important stretching vibrations of xerogel samples of different metallogels as well as gel-constructing chemical ingredients. A substantial amount of peak shifting of xerogel samples for both metallogels is observed in FTIR analysis, indicating the presence of different noncovalent interactions. ESI-mass analysis portrays a possible metallogel-constructing strategy. The antibacterial potentialities of both metallogels were investigated. These materials exhibited good antimicrobial efficacy toward Gram-positive and Gram-negative bacterial strains (including Escherichia coli, Bacillus cereus, Staphylococcus aureus, Listeria monocytogenes, and Salmonella typhimurium). Both synthesized metallogels were successfully implemented to fabricate the photoresponsive semiconducting diode. These materials offer excellent photodiode parameters including an ideality factor and rectification ratio (ON/OFF ratio). Synthesized metallogels are used to successfully fabricate photodiodes with an Al/p-Si/metallogel/Au structure. The ideality factors (η) for Zn-α-Glu-DMF and Zn-α-Glu-DMSO are found as 1.3 and 2.3, respectively, in dark conditions. The rectification ratios for Zn-α-Glu-DMF and Zn-α-Glu-DMSO metallogels are also determined, and these are found as 40 and 10, respectively.
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Affiliation(s)
- Deblina Saha
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Tamal Dey
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Indrajit Pal
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Anupam Kundu
- Department of Botany, Visva-Bharati University, Santiniketan 731235, India
| | - Santanu Majumdar
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
- Department of Chemistry, Seacom Skills University, Kendradangal, Bolpur, Birbhum 731236, West Bengal, India
| | - Subhajoy Sadhu
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Suresh Kumar Yatirajula
- Department of Chemical Engineering, Indian Institute of Technology (ISM) Dhanbad 826004, India
| | - Jnanendra Rath
- Department of Botany, Visva-Bharati University, Santiniketan 731235, India
| | - Samit K Ray
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Biswajit Dey
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
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Chen Z, Zhang R, Zhao S, Li B, Wang S, Lu W, Zhu D. Mechanically Tough and Conductive Hydrogels Based on Gelatin and Z-Gln-Gly Generated by Microbial Transglutaminase. Polymers (Basel) 2024; 16:999. [PMID: 38611257 PMCID: PMC11013726 DOI: 10.3390/polym16070999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/29/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Abstract
Gelatin-based hydrogels with excellent mechanical properties and conductivities are desirable, but their fabrication is challenging. In this work, an innovative approach for the preparation of gelatin-based conductive hydrogels is presented that improves the mechanical and conductive properties of hydrogels by integrating Z-Gln-Gly into gelatin polymers via enzymatic crosslinking. In these hydrogels (Gel-TG-ZQG), dynamic π-π stacking interactions are created by the introduction of carbobenzoxy groups, which can increase the elasticity and toughness of the hydrogel and improve the conductivity sensitivity by forming effective electronic pathways. Moreover, the mechanical properties and conductivity of the obtained hydrogel can be controlled by tuning the molar ratio of Z-Gln-Gly to the primary amino groups in gelatin. The hydrogel with the optimal mechanical properties (Gel-TG-ZQG (0.25)) exhibits a high storage modulus, compressive strength, tensile strength, and elongation at break of 7.8 MPa at 10 °C, 0.15 MPa at 80% strain, 0.343 MPa, and 218.30%, respectively. The obtained Gel-TG-ZQG (0.25) strain sensor exhibits a short response/recovery time (260.37 ms/130.02 ms) and high sensitivity (0.138 kPa-1) in small pressure ranges (0-2.3 kPa). The Gel-TG-ZQG (0.25) hydrogel-based sensors can detect full-range human activities, such as swallowing, fist clenching, knee bending and finger pressing, with high sensitivity and stability, yielding highly reproducible and repeatable sensor responses. Additionally, the Gel-TG-ZQG hydrogels are noncytotoxic. All the results demonstrate that the Gel-TG-ZQG hydrogel has potential as a biosensor for wearable devices and health-monitoring systems.
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Affiliation(s)
| | | | | | | | | | | | - Deyi Zhu
- State Key Laboratory of Biobased Material and Green Papermaking, Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China; (Z.C.); (R.Z.); (S.Z.); (B.L.); (S.W.); (W.L.)
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Pal I, Majumdar S, Lepcha G, Ahmed KT, Yatirajula SK, Bhattacharya S, Chakravarti R, Bhattacharya B, Biswas SR, Dey B. Exploration of Variable Solvent Directed Self-Healable Supramolecular M(II)-Metallogels (M = Co, Ni, Zn) of Azelaic Acid: Investigating Temperature-Dependent Ion Conductivity and Antibacterial Efficiency. ACS APPLIED BIO MATERIALS 2023; 6:5442-5457. [PMID: 37997919 DOI: 10.1021/acsabm.3c00675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Molecular self-assembly assisted self-healing supramolecular metallogels of azelaic acid with cobalt(II)-, nickel(II)-, and zinc(II)-based metal acetate salts were successfully fabricated. Individually, N,N'-dimethylformamide and dimethyl sulfoxide were immobilized within these distinctly synthesized soft-scaffolds of metallogels to attain their semisolid viscoelastic nature. Rheological experiments such as amplitude sweep, frequency sweep, and thixotropic measurements were executed for these metallogels to ratify their gel features. The different extents of supramolecular interactions operating within these solvent-directed metallogels were clearly reflected in terms of their distinct morphological patterns as investigated through field emission scanning electron microscopy. Comparative infrared (IR) spectral properties of metallogels along with individual metal salts and azelaic acid were analyzed. These experimental data clearly depict the significant shifting of Fourier transform (FT)-IR peaks of xerogel samples of different metallogels from the gel-forming precursors. The networks present within the soft-scaffold are evidently illustrated by the electrospray ionization-mass experimental data. The temperature-dependent ionic conductivity studies with these solvent-directed versatile metallogel systems were investigated through impedance spectroscopy. The temperature-dependent impedance spectroscopic studies clearly demonstrate that the ion-transportation within the gel matrix depends not only on the types of cations but also on the dielectric properties of the immobilized solvents. The antipathogenic effect of these metallogel systems has also been explored by testing their effectiveness against human pathogenic Gram-negative bacteria Klebsiella pneumoniae (MTCC 109) and Vibrio parahemolyticus, and Gram-positive bacteria like Bacillus cereus (MTCC 1272). These gel soft-scaffolds show no significant cytotoxicity against both the human neuroblastoma cell line-SH-SY5Y and the human embryonic kidney cell line-HEK 293.
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Affiliation(s)
- Indrajit Pal
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Santanu Majumdar
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Gerald Lepcha
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Kazi Tawsif Ahmed
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Kolkata 700054, India
- Department of Botany, Visva-Bharati University, Santiniketan 731235, India
| | - Suresh Kumar Yatirajula
- Department of Chemical Engineering, Indian Institute of Technology (ISM) Dhanbad 826004, India
| | | | - Rudra Chakravarti
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Kolkata 700054, India
| | - Bireswar Bhattacharya
- Department of Natural Products, National Institute of Pharmaceutical Education and Research, Kolkata 700054, India
| | | | - Biswajit Dey
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
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Pal I, Pathak NK, Majumdar S, Lepcha G, Dey A, Yatirajula SK, Tripathy U, Dey B. Solvent-Driven Variations of Third-Order Nonlinear Thermo-Optical Features of Glutaric Acid-Directed Self-Healing Supramolecular Ni(II) Metallogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16584-16595. [PMID: 37934977 DOI: 10.1021/acs.langmuir.3c02572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
The generation of solvent-directed self-healing supramolecular Ni(II) metallogels of glutaric acid (i.e., Ni-Glu-DMF and Ni-Glu-DMSO) is described in this article. Polar aprotic solvents like N,N'-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) are separately entrapped into the Ni(II)-acetate salt and glutaric acid-mediated networks to attain the semisolid flexible scaffolds. The gel nature of the fabricated materials is experimentally proven through different rheological tests such as amplitude sweep, frequency sweep, and thixotropic (time sweep) measurements. The self-repairing strategy and load-bearing features of the synthesized metallogel are studied in this work. The different supramolecular noncovalent interactions working within the soft scaffold are clearly explored. The formation strategy and the microstructural features of these synthesized metallogels are scrutinized through a Fourier transform infrared (FT-IR) spectroscopy study and field-emission scanning electron microscopy (FESEM) morphological analyses. The FT-IR spectroscopy observation displays a considerable amount of shifting of the infrared (IR) peaks of the xerogel samples of both the metallogels Ni-Glu-DMF and Ni-Glu-DMSO. The electrospray ionization (ESI)-mass spectroscopy result demonstrates the plausible construction of the metallogel network. In order to examine the nonlinear optical characteristics of the two synthesized self-healing metallogels Ni-Glu-DMSO and Ni-Glu-DMF, Z-scan measurements are carried out with a continuous wave (CW) diode-pumped solid-state (DPSS) laser at 532 nm. The nonlinear refractive index, nonlinear absorption coefficient, thermo-optical coefficient, and third-order susceptibility of these metallogels were evaluated by analyzing the experimental data from the Sheik-Bahae formalism. The nonlinear thermo-optical study reveals that these solvent-dependent metallogels show negative signs of nonlinear refractive index and nonlinear absorption coefficient. The figure of merit calculated for these compounds shows good agreement for their use in nonlinear photonic devices.
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Affiliation(s)
- Indrajit Pal
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Nitesh Kumar Pathak
- Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, Jharkhand, India
| | - Santanu Majumdar
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Gerald Lepcha
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Amiya Dey
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Suresh Kumar Yatirajula
- Department of Chemical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, Jharkhand, India
| | - Umakanta Tripathy
- Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, Jharkhand, India
| | - Biswajit Dey
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
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An Z, Liu R, Liu J, Du J, Chen S, Wang X, Sheng Z, Liu H. Monomer Emission Mechanism Research of Tetraphenylethene Derivative with Supramolecular Self-Assembly in Polymer Microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:12153-12158. [PMID: 37582402 DOI: 10.1021/acs.langmuir.3c01455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
The monomer emission property of the tetraphenylethene (TPE) derivative is rarely reported, and its photoluminescence (PL) mechanism related to supramolecular self-assembly needs further in-depth research. Two long alkyl chain modified derivatives, the TPE derivative (TPE-C10) and pyrene derivative (Pyrene-C10), are designed and synthesized, which possess similar supramolecular assembly behavior but exhibit different PL properties. TPE-C10 not only forms self-assembly morphologies with monomer emission but also emits aggregation-induced emission (AIE). Moreover, the polymer microspheres containing TPE-C10 and Pyrene-C10 are prepared, which can dissolve or swell in different organic solvents. The changed binding effect of polymer chains achieves the luminescence transformation of TPE-C10 from AIE to monomer emission. This work hopefully can enrich luminescent materials based on the monomer emission of the TPE derivative and provide a new method for mechanism studies about supramolecular self-assembly and luminescence.
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Affiliation(s)
- Zhihang An
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, P. R. China
| | - Renping Liu
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, P. R. China
| | - Jiaping Liu
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, P. R. China
| | - Jiaying Du
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, P. R. China
| | - Si Chen
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Xu Wang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Zhongyi Sheng
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, P. R. China
| | - Heyang Liu
- College of Biological & Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023, P. R. China
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Azyat K, Makeiff D, Smith B, Wiebe M, Launspach S, Wagner A, Kulka M, Godbert N. The Effect of Branched Alkyl Chain Length on the Properties of Supramolecular Organogels from Mono- N-Alkylated Primary Oxalamides. Gels 2022; 9:gels9010005. [PMID: 36661773 PMCID: PMC9858617 DOI: 10.3390/gels9010005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/10/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Mono-N-alkylated primary oxalamide derivatives with different sized branched alkyl tail-groups were excellent low molecular weight gelators for a variety of different organic solvents with different polarities and hydrogen-bonding abilities. Solvent-gelator interactions were analyzed using Hansen solubility parameters, while 1H NMR and FTIR spectroscopy were used to probe the driving forces for the supramolecular gelation. The molecular structures of the twin tail-groups did not significantly affect the supramolecular gelation behavior in different solvents. However, for select solvents, the molecular structures of the tail-groups did have a significant effect on gel properties such as the critical gelator concentration, thermal stability, gel stiffness, gel strength, network morphology, and molecular packing. Finally, metabolic activity studies showed that the primary alkyl oxalamide gelators had no effect on the metabolic activity of mouse immune cells, which suggests that the compounds are not cytotoxic and are suitable for use in biomedical applications.
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Affiliation(s)
- Khalid Azyat
- Nanotechnology Research Center, National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Darren Makeiff
- Nanotechnology Research Center, National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Bradley Smith
- Nanotechnology Research Center, National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Mickie Wiebe
- Nanotechnology Research Center, National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Steve Launspach
- Nanotechnology Research Center, National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Ashley Wagner
- Nanotechnology Research Center, National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Marianna Kulka
- Nanotechnology Research Center, National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Nicolas Godbert
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
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7
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Curing behaviors and properties of epoxy resins with para-hexatomic ring blocks: Excellent comprehensive performances of tetrafluorophenyl. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122828] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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8
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Lu J, Yu S, Li Z, Lee M, Yang Y, Jin LY. The relationship between molecular structure and supramolecular morphology in the self-assembly of rod-coil molecules with oligoether chains. SOFT MATTER 2020; 16:2224-2229. [PMID: 32055815 DOI: 10.1039/d0sm00018c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Controlling the morphology of rod-coil molecular aggregates is crucial for studying and obtaining functional materials with exceptional properties. In this paper, we report the construction of rod-coil molecular nanoaggregates with well-defined structures. The rod-coil molecules, labeled 1a-1d, consist of a rod section, composed of phenyl and biphenyl groups, and oligoether chains with 7 and 12 repeating units. The final assembled structures showed either oblique or hexagonal columnar structures, depending on the length of the coils in the bulk state. Interestingly, in water, molecules 1a and 1c self-assemble into scrolled nanofibers and cylindrical micelles. Instead, molecules 1b and 1d, which have methyl groups decorated at the interface of the rod and coil sections, self-organize into helical nanofibers and nanorings, respectively. Thus, controlling the length of the coil chains and inserting lateral methyl groups is an effective strategy to construct precise rod-coil molecular assemblies in the bulk and in aqueous solution.
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Affiliation(s)
- Jie Lu
- Department of Chemistry, Yanbian University, Yanji 133002, P. R. China.
| | - Shengsheng Yu
- Department of Chemistry, Shandong University of Technology, Zibo 255000, P. R. China
| | - Zhaohua Li
- Department of Chemistry, Yanbian University, Yanji 133002, P. R. China.
| | - Myongsoo Lee
- School of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yuntian Yang
- Department of Chemistry, Yanbian University, Yanji 133002, P. R. China.
| | - Long Yi Jin
- Department of Chemistry, Yanbian University, Yanji 133002, P. R. China.
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Shan T, Gao L, Tong X, Du Q, An Z, He H, Lin J, Chen S, Wang X. The Special “Morse Code” between Solvent Polarity and Morphology Flexibility in a POSS–Dendrimer Supramolecular System. Chemistry 2019; 25:12098-12104. [DOI: 10.1002/chem.201901422] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/02/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Tianyu Shan
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Liang Gao
- Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Xiaoqian Tong
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Qinqing Du
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Zhihang An
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Huiwen He
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Jiaping Lin
- Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Si Chen
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Xu Wang
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
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An Z, Chen S, Tong X, He H, Han J, Ma M, Shi Y, Wang X. Widely Applicable AIE Chemosensor for On-Site Fast Detection of Drugs Based on the POSS-Core Dendrimer with the Controlled Self-Assembly Mechanism. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2649-2654. [PMID: 30672709 DOI: 10.1021/acs.langmuir.8b03275] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel fluorescence chemosensor that can quickly on-site detect synthetic drugs and undergo prescreening is first reported. An eight tetraphenylethene (TPE)-modified polyhedral oligomeric silsesquioxane (POSS) dendrimer is designed and synthesized as an aggregation-induced emission (AIE) chemosensor, which exhibits great enhancement of unique monomer emission in pure tetrahydrofuran (THF) and AIE emission in THF/water, thanks to forming different self-assembly morphologies. In addition, POSS-TPE can sensitively detect methamphetamine and ketamine even in artificial saliva by noncovalent interaction forces. It has great potential to be a new widely applicable AIE chemosensor for aromatic molecules.
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Affiliation(s)
- Zhihang An
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Si Chen
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Xiaoqian Tong
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Huiwen He
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Jin Han
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Meng Ma
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Yanqin Shi
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Xu Wang
- College of Materials Science and Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
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Kumar BA, Nayak RR. Phenoxy‐Alkyl Maleates as Phase‐Selective Organogelators for Gelation of Edible Oils. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201800364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bijari A. Kumar
- Centre for Lipid Science and TechnologyCSIR‐Indian Institute of Chemical TechnologyUppal RoadHyderabad500 007India
- Academy of Scientific and Innovative ResearchNew Delhi110 025India
| | - Rati R. Nayak
- Centre for Lipid Science and TechnologyCSIR‐Indian Institute of Chemical TechnologyUppal RoadHyderabad500 007India
- Academy of Scientific and Innovative ResearchNew Delhi110 025India
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12
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Yang Y, Zhong K, Chen T, Jin LY. Morphological Control of Coil-Rod-Coil Molecules Containing m-Terphenyl Group: Construction of Helical Fibers and Helical Nanorings in Aqueous Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10613-10621. [PMID: 30107734 DOI: 10.1021/acs.langmuir.8b01904] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Rod-coil molecules, composed of rigid segments and flexible coil chains, have a strong intrinsic ability to self-assemble into diverse supramolecular nanostructures. Herein, we report the synthesis and the morphological control of a new series of amphiphilic coil-rod-coil molecular isomers 1-2 containing flexible oligoether chains. These molecules are comprised of m-terphenyl and biphenyl groups, along with triple bonds, and possess lateral methyl or butyl groups at the coil or rod segments. The results of this study suggest that the morphology of supramolecular aggregates is significantly influenced by the lateral alkyl groups and by the sequence of the rigid fragments in the bulk and in aqueous solution. The molecules with different coils self-assemble into lamellar or oblique columnar structures in the bulk state. In aqueous solution, molecule 1a, with a lack of lateral groups, self-assembled into large strips of sheets, whereas exquisite nanostructures of helical fibers were obtained from molecule 1b, which incorporated lateral methyl groups between the rod and coil segments. Interestingly, molecule 1c with lateral butyl and methyl groups exhibited a strong self-organizing capacity to form helical nanorings. Nanoribbons, helical fibers, and small nanorings were simultaneously formed from the 2a-2c, which are structural isomers of 1a, 1b, and 1c. Accurate control of these supramolecular nanostructures can be achieved by tuning the synergistic interactions of the noncovalent driving force with hydrophilic-hydrophobic interactions in aqueous solution.
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Affiliation(s)
- Yuntian Yang
- Key Laboratory for Organism Resources of the Changbai Mountain and Functional Molecules, Ministry of Education, and Department of Chemistry, College of Science , Yanbian University , Yanji 133002 , China
| | - Keli Zhong
- College of Chemistry, Chemical Engineering and Food Safety, Bohai University , Jinzhou 121013 , China
| | - Tie Chen
- Key Laboratory for Organism Resources of the Changbai Mountain and Functional Molecules, Ministry of Education, and Department of Chemistry, College of Science , Yanbian University , Yanji 133002 , China
| | - Long Yi Jin
- Key Laboratory for Organism Resources of the Changbai Mountain and Functional Molecules, Ministry of Education, and Department of Chemistry, College of Science , Yanbian University , Yanji 133002 , China
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Meyer AR, Bender CR, Dos Santos DM, Ziembowicz FI, Frizzo CP, Villetti MA, Reichert JM, Zanatta N, Bonacorso HG, Martins MAP. Effect of slight structural changes on the gelation properties of N-phenylstearamide supramolecular gels. SOFT MATTER 2018; 14:6716-6727. [PMID: 30062361 DOI: 10.1039/c8sm00961a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Supramolecular gels present several applications in which the gelator properties are closely dependent on their structure and solvent. Despite this, there are few studies on the effect of the gelation ability of gelators with slight molecular changes. Therefore, N-arylestearamides (in which aryl = phenyl (1), 4-tolyl (2) and 4-acetylphenyl (3)) were evaluated in different solvents. The critical gelefication concentration (CGC) values indicated that the substituents can significantly affect the concentration at which the supramolecular gels are formed, mainly in non-aromatic solvents (e.g. cyclohexane, acetonitrile and DMSO). From UV-Vis and DSC data, we verified that the gel-sol and sol-gel transitions (Tgel-sol and Tsol-gel) increase in the order of 1 < 2 < 3. Organogel strength was evaluated for 1-3 as a function of concentration and solvent type using rheology data. Gel strength is concentration-dependent and a strength order was found in acetonitrile, cyclohexane and DMSO, in which: 1 ∼ 2 > 3. Dynamic viscoelastic measurements as a function of temperature sweeps indicate a predominantly enthalpic contribution to the elasticity of the organogels formed from 1-3. Temperature-dependent 1H NMR indicates that NHO interactions may be responsible for the molecular association of molecules into 1D fibers, while 3D fibers were formed from van der Waals interactions.
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Affiliation(s)
- Alexandre R Meyer
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil.
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